CN101188470A - Uplink and downlink wavelength distribution and management method based on rough wave division multiple address FTTH technology - Google Patents
Uplink and downlink wavelength distribution and management method based on rough wave division multiple address FTTH technology Download PDFInfo
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- CN101188470A CN101188470A CNA2007101727085A CN200710172708A CN101188470A CN 101188470 A CN101188470 A CN 101188470A CN A2007101727085 A CNA2007101727085 A CN A2007101727085A CN 200710172708 A CN200710172708 A CN 200710172708A CN 101188470 A CN101188470 A CN 101188470A
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Abstract
The invention provides a FTTH (Fiber to The Home) broadband access distribution and management method which is based on uplink and downlink optical wavelength. The method includes the following steps: in the downlink, a plurality of coarse wave optical signals by standard wavelength gathers in an optical fiber via a bureau end device, and then an optical divider serves as a multi-channel signal which gets demultiplexed by a de-multiplexer into the same number of coarse wave wavelength based business signals as the number of the coarse wave standard wavelength based optical signals, and then the coarse wave wavelength based business signals are provided for users; in the uplink, a plurality of far-end devices send out signals which are converted into the optical modulation signals with the same wavelength via electro-optic conversion. The uplink wavelength distribution and management can be realized by an optical switch and a wavelength conversion device. The device converts the input user-end optical modulation signals into the coarse wave standard wavelength based signals with varied wavelength, and the coarse wave standard wavelength based signals are multiplexed onto the optical fiber by a wave coupler and transmitted to the bureau end device.
Description
Technical field
The present invention relates to optical communication field, relate in particular to a kind of allocation management method based on the uplink and downlink wavelength in the thick wavelength division multiple access FTTH technology.
Background technology
Development progress based on the allocation manager technology of wavelength is slower, is because the active user is also few to the demand of big bandwidth on the one hand, is because cost is higher, so the technical development of this respect is unhappy on the other hand.Continuous growth along with the big band width service of network, high-end user is increasing to the demand of bandwidth, the development of new technology descends relevant cost gradually, and particularly FTTH makes the allocation manager technology based on wavelength become clear in the application prospect of Access Network in the fast development in the whole world.
Traditional broadband access technology mainly contains following:
ADSL、ADSL2、ADSL2+、VDSL
LAN
APON/BPON
The G.983 series standard institute standard of ITU-T SG15: downgoing line speed can expand to 1244.16Mbit/s, the up 622.08Mbit/s that expands to
EPON
IEEE802.3Ah working group also claims EFM (EFM:Ethernet in the First Mile) to organize the PON system based on gigabit Ethernet of institute's standard
GPON
The GPON (Gigabit-capable passiveoptical Networks) of the G.984 series standard institute standard of ITU-T SG15, technical characteristic is to adopt the GFP (Generic Framing Procedure) of ITU-TG.7041 definition that multiple business such as Ethernet, TDM, ATM are encapsulated mapping at two layers, the upstream rate of 1.25Gb/s and 2.5Gb/s downstream rate and all standards can be provided, and have powerful OAM(Operation Administration Maintenance).Aspect two-forty and support multi-service, GPON has a clear superiority in, and will be the important development direction of PON, but the cost of GPON will be higher than EPON.
The greatest drawback of these technology is the enormous bandwidth that do not have fully to excavate optical fiber, the paces that incompatible following bandwidth demand increases, underaction economy during capacity upgrade.
Fiber to the home (FTTH) is the bandwidth bottleneck that broadband network is thoroughly broken Access Layer, realizes the inevitable choice of the omnidistance fiberize of transmission network.FTTH need adopt the passive light distribution technique usually, so that be communicated with the user side that disperses, guarantees the high reliability of signal transmission.Among the current FTTH based on EPON (PON), the light distribution technique is asymmetric access way mostly, be applicable to the client that the upstream data amount is less, the bandwidth upgrading limited ability, the demand of incompatibility multimedia messages fast development can not satisfy video and the bigger business demand of data interaction amount.
Can fundamentally solve the bandwidth bottleneck of Access Network based on the multi-plexing light accessing system of thick wavelength division multiple access, and can reserve huge available bandwidth for the demand growth of system in future capacity, system adopts ripe and optical device and module cheaply, by with the sign of wavelength as the user side remote equipment, the high speed symmetry that reaches the up-downgoing data transmits, can make full use of the huge transmittability of optical fiber, realize high speed, the transparent access of multiple business, what make the upgrading of network and integrated service provides convenient and economical.Current, the multi-plexing light accessing system of thick wavelength division multiple access does not also have a kind of Wavelength Assignment administrative skill comparatively effectively and cheaply.
Summary of the invention
The objective of the invention is to propose a kind of up-downgoing Wavelength Assignment and dispatching technique at thick wavelength division multiple access multi-plexing light accessing system, realize to the user being the distribution and the management of the bandwidth of granularity with the wavelength by it, particularly upward signal is provided effectively and technical scheme cheaply, realize effective carrying the bidirectional high speed band width service.
For this reason, the invention provides a kind of allocation management method based on uplink and downlink wavelength, this method comprises: when descending, by a local side apparatus a plurality of thick wavelength-division standard wave lengths' light signal is closed ripple on an optical fiber, be the several signal by an optical branching device again, by Deplexing apparatus described several signal is demultiplexed into a plurality of thick wavelength-division wavelength service signal that equates with described a plurality of thick wavelength-division standard wave lengths' light signal quantity again, and these thick wavelength-division wavelength service signals are offered the user respectively; When up, a plurality of ustomer premises access equipments send signal, be converted to the light modulating signal of identical wavelength by electric light, realize the allocation manager of up wavelength by optical switch and Wavelength converter, the user side light modulating signal of this device handle input converts the thick wavelength-division wavelength signals of different wave length to, is multiplexed into by wave multiplexer and is transferred to described local side apparatus on the optical fiber.
In addition, in above-mentioned allocation management method based on uplink and downlink wavelength, when up, described optical switching device is carried out the distribution and the scheduling of wavelength in conjunction with described wavelength converting equipment, and discerns the upward signal that different remote equipments send.
In addition, in above-mentioned allocation management method based on uplink and downlink wavelength, described distribution and scheduling are granularity with the wavelength, and described identification is carried out according to wavelength.Descending optical wavelength allocation manager is that local side apparatus and Deplexing apparatus are finished jointly, and local side apparatus sends control command, and the tunable optical filtering of described Deplexing apparatus is controlled, and is the thick wavelength-division standard wave length's of remote equipment allocation of downlink light signal.
In addition, in above-mentioned allocation management method based on uplink and downlink wavelength, described local side apparatus sends control command, and described optical switching device is controlled, and thinks that described remote equipment distributes up thick wavelength-division standard wave length's light signal.The main effect of optical switch provides the corresponding different up thick wavelength-division standard wave lengths' of different user end signal the flexible dispatching and the ability of management.
According to another aspect of the present invention, also provide a kind of system, this system comprises: a plurality of local side apparatus; Optical branching device links to each other with described a plurality of local side apparatus; Deplexing apparatus links to each other with described optical branching device; A plurality of remote equipments link to each other with described demodulation multiplexer respectively; Photoelectric conversion device links to each other with described a plurality of remote equipments; Optical switching device links to each other with described photoelectric conversion device; Wavelength converting equipment links to each other with described optical switching device; And wave multiplexer, link to each other with described wavelength converting equipment.Wherein, when descending, by a local side apparatus a plurality of thick wavelength-division standard wave lengths' light signal is closed ripple on an optical fiber, be divided into the several signal by an optical branching device again, described several signal is demultiplexed into a plurality of thick wavelength-division wavelength service signal that equates with described a plurality of thick wavelength-division standard wave lengths' light signal quantity by demodulation multiplexer again, and these thick wavelength-division wavelength service signals are offered the user respectively, when up, a plurality of ustomer premises access equipments send signal, be converted to the light modulating signal of identical wavelength by electric light, realize the allocation manager of up wavelength by optical switch and Wavelength converter, the user side light modulating signal of this device handle input converts the thick wavelength-division wavelength signals of different wave length to, is multiplexed into by wave multiplexer and is transferred to described local side apparatus on the optical fiber.
In addition, in said system, when up, described optical switching device is carried out the distribution and the scheduling of wavelength in conjunction with described wavelength converting equipment, and discerns the upward signal that different remote equipments send.
In addition, in said system, described distribution and scheduling are granularity with the wavelength, and described identification is carried out according to wavelength.Descending optical wavelength allocation manager is that local side apparatus and Deplexing apparatus are finished jointly, and local side apparatus sends control command, and the tunable optical filtering of described Deplexing apparatus is controlled, and is the thick wavelength-division standard wave length's of remote equipment allocation of downlink light signal.
In addition, in said system, described local side apparatus sends control command, and described optical switching device is controlled, and thinks that described remote equipment distributes up thick wavelength-division standard wave length's light signal.The main effect of optical switch provides the corresponding different up thick wavelength-division standard wave lengths' of different user end signal the flexible dispatching and the ability of management.
In sum, the present invention proposes uplink and downlink signals Wavelength Assignment and the administrative skill of a kind of FTTH of being used for, realize to the user being the distribution and the dispatching management of the bandwidth of granularity with the wavelength by it.The two fine modes of system design adopted, transmitting-receiving is separately put the light passive network structure of multiple spot.For reducing system cost, improve transmission bandwidth, adopting channel spacing in the system building is the thick wavelength-division OUT of 20nm and the Distributed Feedback Laser and the filter of non-refrigeration, because of being positioned the Access Network aspect, so do not adopt image intensifer, entire system has characteristics such as low cost, low-power consumption, small size like this.System descending adopts Coarse Wavelength Division Multiplexing and in conjunction with broadcast mode, down direction is user's assignment wavelength by local side apparatus, the thick wavelength division multiple access of up employing inserts (WDMA), with the sign of wavelength as user side ONU, transmit with the high speed symmetry that realizes the up-downgoing data, up direction is in conjunction with user's wavelength and optical switch Switching Module identification particular user.Because the transparency of light signal, the convenient high speed of multiple business that realizes inserts.Because the user can monopolize or shared single wavelength, make bandwidth that enough guarantees be arranged, and possess the ability of quick upgrading, thus the convenient user's access that realizes the different bandwidth demand.Local side apparatus specifies thick wavelength-division standard wave length to finish the signal transmission as passage to the control of optical switch and tunable filter by one.
Should be appreciated that the above generality of the present invention is described and the following detailed description all is exemplary and explanat, and be intended to the further explanation that the invention provides for as claimed in claim.
Description of drawings
Comprise that accompanying drawing is for providing the present invention further to be understood, they are included and are constituted the application's a part, and accompanying drawing shows embodiments of the invention, and play the effect of explaining the principle of the invention with this specification.In the accompanying drawing:
Fig. 1 shows the general structure schematic diagram of realizing system of the present invention.
Embodiment
Now with embodiments of the present invention will be described by referring to the drawings in detail.
Thick wavelength division multiple access multi-plexing light accessing system is the combination of wavelength-division multiplex technique and PON technology, is a kind of passive broadband integrated symmetrical access technology, and it is made of local side apparatus OLT, remote equipment ONT, passive light distribution network ODN.Its structural representation as shown in Figure 1.
On the down direction below Fig. 1, through a multiplexer 16 thick wavelength-division standard wave lengths' optical service signal is closed ripple on an optical fiber by local side apparatus OLT, be transferred near on the broadband light splitter W of user area, be divided into 4 road signals through this optical branching device, respectively through 4 Deplexing apparatus D1～D4, obtain 16 descending thick wavelength-division wavelength service signals, receive respectively on 16 Optical Network Terminal remote equipments 1～16, directly offer the user.Wherein, the bandwidth of each wavelength can be monopolized or a plurality of user shares for user.
On the up direction above Fig. 1, the signal that sends by remote equipment 1～16, by behind the electro-optical conversion cheaply, obtain the light modulating signal of same wavelength, be transferred to contiguous machine room place, be connected to the input (optical switch and wavelength shifter are to be integrated in the same device) of wavelength converting equipment λ by optical switching device K, the thick wavelength-division wavelength signals of exportable 16 different wave lengths of output is multiplexed into the input that uploads to local side apparatus on the optical fiber by wave multiplexer M again.Optical switch module K can provide effective Wavelength Assignment and dispatching management means in conjunction with wavelength converting equipment, and dispatching management and the upward signal that sends of the different remote equipments of identification provide the high-speed transfer bandwidth of upward signal.The control command that the management control system of local side apparatus end is sent is controlled optical switch module, goes up the thick wavelength-division wavelength signals of column criterion for the remote equipment end distributes.
In said system, can adopt Open architecture, can compatible GE and 100M Ethernet light mouth, 155M, 622MPOS light mouth.Optical interface speed: 100M-1.25Gb/s, interface data type: Ethernet and video etc.Line interface: the light mouth of 16 ripple CWDM wavelength.The OTU unit is an optical wavelength conversion element, the light signal that receives on the panel is converted to the light signal of CWDM specific wavelength.The bandwidth that each ONU point sharing bandwidth also can be monopolized a wavelength is distributed bandwidth by the unified scheduling of optical wavelength allocation schedule management system provided by the invention in the local side apparatus, and by Dynamic Bandwidth Allocation, line bandwidth can be fully utilized.
In above-mentioned implementation, the present invention can adopt Passive Optical Components such as CWDM, to reduce cost; Particularly user side adopts semiconductor laser cheaply, by closing on centralized management and the maintenance that optical switch that machine room places and Wavelength converter are realized up wavelength.System's maximum branch ratio is 1: 64, and branch's progression is more than 3 grades; Can realize transmission at a distance: point-to-point maximum transmission distance 60km, put multiple spot maximum transmission distance 30km, 20 kilometers transmission range requirements that G.983 require considerably beyond ITU-T; Two fine two-way operations adopt G.652 optical fiber of single mode, up-downgoing symmetrical rate: 155Mbit/s, 622Mbit/s, 1000Mbit/s; The multi-service tenability; Tree network, the access problem of solution residential quarter, group user; Also can adopt point-to-point connected mode, be fit to application demands such as high bandwidth local area network interconnection, storage area network.In conjunction with other technology, also can provide the distribution and the dispatching management of lower bandwidth granularity simultaneously.
Those skilled in the art can be obvious, can carry out various modifications and variations and without departing from the spirit and scope of the present invention to above-mentioned exemplary embodiment of the present invention.Therefore, be intended to that the present invention is covered and drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present invention and modification.
Claims (10)
1. the allocation management method based on uplink and downlink wavelength is characterized in that, comprising:
When descending; The allocation manager of downstream wavelength is provided by a local side apparatus and the Deplexing apparatus controlled thereof; The amount of bandwidth that local side provides is as requested closed ripple on an optical fiber with a plurality of thick wavelength-division standard wave lengths' optical signal; Be divided into some roads signal by an optical branching device again; Described some roads signal is demultiplexed into a plurality of thick wavelength-division wavelength service signal that equates with described a plurality of thick wavelength-division standard wave lengths' optical signal quantity by Deplexing apparatus again; And these thick wavelength-division wavelength service signals are offered respectively different user
When up, a plurality of ustomer premises access equipments send signal, be converted to the light modulating signal of identical wavelength by electric light, realize the allocation manager of up wavelength by optical switch and Wavelength converter, the user side light modulating signal of input is converted to the thick wavelength-division wavelength signals of different wave length, be multiplexed into by wave multiplexer again and be transferred to described local side apparatus on the optical fiber.
2. the allocation management method based on uplink and downlink wavelength as claimed in claim 1, it is characterized in that, when up, described optical switch and Wavelength converter are carried out the distribution and the scheduling of up wavelength under the control of local side apparatus, and discern the upward signal that the different user end sends.
3. the allocation management method based on uplink and downlink wavelength as claimed in claim 1 is characterized in that, described distribution and scheduling are granularity with the wavelength, and described identification is carried out according to wavelength.
4. the allocation management method based on uplink and downlink wavelength as claimed in claim 1 is characterized in that described local side apparatus sends control command, and described optical switch is controlled, and thinks that described remote equipment distributes up thick wavelength-division standard wave length's light signal.
5. the allocation management method based on uplink and downlink wavelength as claimed in claim 1, it is characterized in that, descending optical wavelength allocation manager is that local side apparatus and Deplexing apparatus are finished jointly, local side apparatus sends control command, tunable optical filtering to described Deplexing apparatus is controlled, and is the thick wavelength-division standard wave length's of remote equipment allocation of downlink light signal.
6. a system is characterized in that, comprising:
A plurality of local side apparatus;
Optical branching device links to each other with described a plurality of local side apparatus;
Deplexing apparatus links to each other with described optical branching device;
A plurality of remote equipments link to each other with described Deplexing apparatus respectively;
Photoelectric conversion device links to each other with described a plurality of remote equipments;
Optical switching device links to each other with described photoelectric conversion device;
Wavelength converting equipment links to each other with described optical switching device; And
Wave multiplexer links to each other with described wavelength converting equipment,
Wherein, when descending, by a local side apparatus a plurality of thick wavelength-division standard wave lengths' light signal is closed ripple on an optical fiber, be divided into the several signal by an optical branching device again, described several signal is demultiplexed into a plurality of thick wavelength-division wavelength service signal that equates with described a plurality of thick wavelength-division standard wave lengths' light signal quantity by Deplexing apparatus again, and these thick wavelength-division wavelength service signals are offered the user respectively
When up, a plurality of ustomer premises access equipments send signal, be converted to the light modulating signal of identical wavelength by electric light, realize the allocation manager of up wavelength by optical switch and Wavelength converter, the user side light modulating signal of input is converted to the thick wavelength-division wavelength signals of different wave length, be multiplexed into by wave multiplexer again and be transferred to described local side apparatus on the optical fiber.
7. system as claimed in claim 6 is characterized in that, when up, described local side apparatus and optical switching device are carried out the distribution and the scheduling of wavelength in conjunction with described wavelength converting equipment, and discern the upward signal that different remote equipments send.
8. system as claimed in claim 6 is characterized in that, described distribution and scheduling are granularity with the wavelength, and described identification is carried out according to wavelength.
9. system as claimed in claim 6 is characterized in that described local side apparatus sends control command, and described optical switch is controlled, and thinks that described remote equipment distributes up thick wavelength-division standard wave length's light signal.
10. system as claimed in claim 6, it is characterized in that, descending optical wavelength allocation manager is that local side apparatus and Deplexing apparatus are finished jointly, local side apparatus sends control command, tunable optical filtering to described Deplexing apparatus is controlled, and is the thick wavelength-division standard wave length's of remote equipment allocation of downlink light signal.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102572620A (en) * | 2012-02-02 | 2012-07-11 | 中兴通讯股份有限公司 | Optical module and optical wave multiplexing system |
| CN102695101A (en) * | 2011-03-21 | 2012-09-26 | 苏州海光芯创光电科技有限公司 | Passive optical network over wavelength division multiplexing |
| CN109476264A (en) * | 2016-06-24 | 2019-03-15 | 矢崎总业株式会社 | Vehicle circuit body |
| CN110505012A (en) * | 2019-09-27 | 2019-11-26 | 唐彦 | A kind of the bottleneck judgment method and device of wavelength-division system |
-
2007
- 2007-12-21 CN CNA2007101727085A patent/CN101188470A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102695101A (en) * | 2011-03-21 | 2012-09-26 | 苏州海光芯创光电科技有限公司 | Passive optical network over wavelength division multiplexing |
| CN102695101B (en) * | 2011-03-21 | 2015-11-18 | 苏州海光芯创光电科技有限公司 | EPON on a kind of wavelength division multiplexing |
| CN102572620A (en) * | 2012-02-02 | 2012-07-11 | 中兴通讯股份有限公司 | Optical module and optical wave multiplexing system |
| CN109476264A (en) * | 2016-06-24 | 2019-03-15 | 矢崎总业株式会社 | Vehicle circuit body |
| US11407371B2 (en) | 2016-06-24 | 2022-08-09 | Yazaki Corporation | Vehicular circuit body |
| CN110505012A (en) * | 2019-09-27 | 2019-11-26 | 唐彦 | A kind of the bottleneck judgment method and device of wavelength-division system |
| CN110505012B (en) * | 2019-09-27 | 2022-11-04 | 唐彦 | Method and device for judging bottleneck of wavelength division system |
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Open date: 20080528 |